Suction intensifier



ug- 25, 1931- H. HuEBl-:R ET AL sUcTIoN INTENSIFIER Fuga Aug. 5, 1929 @am MhdJ/Lield Cle amer Mr- ,7b [nale [Vani/01d Patented Aug. 25, 1931 UNITED STATES PATENT' OFFICE HENRY HUEBER, OF BUFFALO, .AND ERWIN C. HORTON, F HALBURG, NEW YORK, ASSIGNORS TO TRIGO PRODUCTS CORPORATION, 0F BUFFALO, NEW YORK SUCTION I'IN'TENSIFIEIl't Application led August 3, 1929. Serial No. 383,191.

This invention relates to a suction intensifier or augmenter .for boosting the influence of manifold suction on automobile. accessories, the construction herein being an improve- 5 ment on ,the disclosure made in the co-pending application for patent on a suction augmenting device filed April 2, 1928, Serial No. 266,839 in the name of Henry Hueber.

Pressure variations, in the intake manifold 1o of motor vehicle engines, are quite marked and noticeable in their infiuence and effect on the operation of an accessory such as a windshield cleaner. Thus when thevengine is throttled the manifold suction supply is 15 quite ample and efficient whereas when the intake manifold is more or less fully opened and the engine laboring, the degree of manifold suction is insufficient to operate the accessory at the desired normal. The ad,- vantage of an augmenting device for intensifying or boosting the manifold suction when of an inefficient degree is, therefore, quite obvious. The introduction of the venturi in the suction line of awindshield cleaner has the effect of boosting an inefficient supply of manifold suction to a practical dev grec. In the above referred to application means are provided for avoiding the action of the venturi or intensifier when the manifold suction has reached or exceeds a practical degree.

The primary aim of this invention isI to simplif and compact the construction of the intensi er into a more practical assembly, and one which provides ample protection for the moving and sensitivelparts of the" mechamsm. y

The invention furtherresides in mounting the Venturi control valve as a unit with the suction responsive member or piston, the entire unit being self-contained and adaptedl for placement and displacement` as a` unitI in and from the assembly. f

The inventionis also found to reside in the mounting of the valve on thel pistou and also in the resilient mounting of the piston in its cylinder or chamber, as will be more fully pointed out in the .description and appended claims, reference being made' to the accompanying drawings wherein,

Fig. 1 is a vertical sectional view through the intensifier construction in accordance with the present invention.

^ Fig. 2 is a plan view thereof with a part of the cover plate broken away so as to show more clearly the underlying mechanism.

Fig. 8 is a detailed perspective View of the valve-piston unit.

` Proceeding in accordance with the present invention, the numeral 1 designates the body of the intensifier through which extends a venturi passage consisting of an inlet port 2 provided in the nozzle member 3, a spaced and fiaring outlet or delivery passage 4, and an interposed aspirator or induction chamber 5 leading to an induced flow port 6 designed for connection to a suction operated mechanism or accessory, such asthe windshield cleaner of a motor vehicle. The delivery passage 4 is designed for connection to the intake manifold of the motor vehicle engine.

-The intensifier is provided with a chamber 7 which receives a pressure responsive member, said chamber being provided with a port 8 for establishing communication with the delivery passage 4. Within the chamber may be disposed a bushing 9 so as to provide for a better sliding fit of the pressure responsive member or piston 10, which latter has its piston rod or st'em reduced, as at 11, for being received in the slot 12 formed in the extension 13 of the control valve 14. The valve is preferably of the disc type and is designed for seating on the outer end of nozzle member 3.

Normally the valve is urged from its seat by spring means which also function to lift the piston in its chamber 7 against the action of an inefficient supply of manifold suction to thereby open the nozzle passage 2 and set the intensifier in action. To make the piston and valve assembly complete in itself this spring 15 is incorporated in the unit and is herein depicted as coilingl about the piston rod 16 beneath the reduced portion 11.

As a support for the lower or inner end of the spring there is provided'a plate 17 through which the piston rod has free sliding movement and which is itself of sufficient diis of smaller diameter than the piston itself so that when the'piston is removed-from itsV chamber or cylinder the plate will be lifted out by the underlying piston 10 so that the entire assembly is self-contained and can not be disrupted without first displacing the' valve laterally, or disengaging the reduced portion 11 from the slot 12, whereupon the spring 15 and the platev 17 may be axially displaced from the piston rod.

A cover plate 19 is mounted on the upstanding and surrounding wall 20 of the body 1 and is secured in position by a pair of fastening elements one of which is indicated at 21. The surrounding wall 20 encloses the space 22 and defines a valve chamber which is open to the atmosphere, as through openings 23 provided in the cover plate 1 With the parts related as shown in Fig. 1 the Venturi passage of the intensifier is'rendered inoperative by reason of an efficient or excessive supply lof manifold suction maintaining in the manifold or the outlet side Vof the intensifier, and in this position the piston f will then acty in its entirety upon the windshield cleaner motor or other accessory.

When the manifold suction becomes ineiiicient and the pressure in the chamber 7 beneath the piston 10 approaches the atmospheric pressure the spring 15 will cause the Valve 14 to lift from its vseat whereu on the atmospheric air'will enter through t e nozzle 3 and induce a higher degree of suction in the chamber 5 than that which maintains at the manifold side of the intensifier, Such lifted or inoperative position of the valve is indicated by the dotted showing in Fig. 1. The entire assembly of the intesifier has been compacted and simplified. It is easilydisassembled for repair, and is thoroughly protected against exposure of its operating parts. The cover 19 acts as ameans for preventing displacement of the valve-piston unit entirely/from the intensifier chamber, and may serveto prevent outward displacement beyond` the range of influence of an excessive degree of manifold suction. The

valve-piston unit is simple in design, the

spring acting secondarily to frictionally hold the extension 1 3 from working laterally and becoming dislodged from the reduced portion 1 1 of the piston rod or stem.

In placing the unit within the intensifier body it is only necessary to position the piston in the chamber 7 and as the piston descends within the latter the spring-supporting plate 17 will enga e the shoulder 18 and resillently arrest an support the piston. The Yvalve is supported wholly by the piston and tis bodily moved thereby during operation.

What is claimedis:

1. A suction intensifier for the suction lines of automobile accessories, comprising a body having an injector nozzle discharging across an aspirator chamber into a deliver passage, a cylinder formed in` the body and having its lnner end communicating with. the delivery passage, a piston operable-'in the cylinder, avalve having an extension provided with a slot, a iston rod connected to the piston and havmg a part receivable in the slot of said valve extension for detachably connecting the valve to the piston to be operated thereby, and resilient means carried by the piston rod and engaging a fixed part of the body for resiliently supporting the valve and piston as a unit.

2. A suction intensifier for windshield cleaners, comprising a unitary body having a Venturi passage therethrough and a chamy ber communicating with the outlet side thereof, a valve for controlling the passage of atmospheric air through the injector portion of the Venturi passage, a pressure responsive member o rable in the chamberiand having a rod, sai valve having a part engaging said rod for supporting the valve from the rod for bodily movement as a unit therewith, a spring encircling the rod beneath the valve part, and a spring supporting plate slidably receiving the rod and sup orting the adjacent end of the spring, said body having a shoulder on which said plate engages to coact with the spring in resiliently supporting said member.

3. A suctionhintensifier.comprising a body having an injector nozzle, a delivery passage, and an interposed aspirator chamber, said` body also nhaving a valve chamber surrounding the outer end of the nozzle, a cylinder .communicating at its inner end with the delivery passage, a piston operable in the cylinder and having a rod extending into the valve chamber, a valve arranged in said valve chamber and movable to close the outer end of the nozzle, said piston rod constituting the sole means of support for the valve, and spring means arranged on the piston rod beneath the valve extension for resiliently supporting the valve and piston as a unit from a fixed part of the bod v 4. A suction intensifier comprising a unitary body having a cylinder, a piston operable in the cylinder, a delivery passage in the body with which the cylinder communicates, an injector nozzle' in the, body discharging into the passage and defining with said lpassage an aspirator chamber, a valve for open- Cil ing and closing said injector nozzle and supported by said piston, means connecting the piston and valve as a unit, and means embodied in said unit and removable therewith as a unit for resiliently supporting the piston in its cylinder.

5. A suction intensifier comprising a unitary body having a cylinder, a fluid pressure responsive piston operable in the cylinder, a delivery passage inthe body with which the cylinder communicates, an injector nozzle in the body discharging into the passage and defining with saidpassage an aspirator chamber, a valve for opening and closing said injector nozzle, said piston having a rod which carries said valve, and a spring encircling the piston rod and confined between the valve and a fixed part of the body.

6. A suction intensifier comprising a unitary body having a cylinder, a piston operable in the cylinder, a delivery passage in the body ,with which the cylinder communicates, an injector nozzle in the body discharging into the passage and defining with said passage an aspirator chamber, a valve for opening and closing said injector nozzle, said piston having a reduced rod to which said valve is connected, a spring encircling the rod, a spring supporting plate on said rod between the spring and the piston and eX- tending radially beyond the latter for engaging a part of said body to support the piston therefrom and through the spring.

7. A suction intensifier for the suction lines of automobile accessories, comprising a body having an injector nozzle discharging across an aspirator chamber into adelivery passage, said delivery passage being connectible to the intake manifold-and said chamber being connectible to the accessory, a cylinder formedl in the bod and having its inner end communicating with the delivery passage, a piston operable in the cylinder, a valve for the injector nozzle having a part connected to said piston for movement therewith as a unit, and means for urging said piston and valve as a unit to a position to open the injector nozzle, whereby suction maintaining in the intake manifold may be communicatedthrough the delivery passage to the cylinder to move said piston and valve as a unit to a position to close the injector nozzle.

8. A suction intensifier for the suction lines of automobile accessories, comprising a body having an injector nozzle discharglng across an aspirator chamber into a delivery passage, a cylinder formed in the body and having its inner end communicating with the delivery passage, a piston operable in the cylinder, a Valve having an extension provided with a slot, said piston having a rod portion having a part receivable in the slot of said valve extension for detachably connecting the valve tothe piston to be operated thereby, and resilient means engaging the valve extension and a fixed part of the body for holding the extension of the valve having the slot against the part of the rod portion receivable in the slot for preventing accidental displacement of the rod portion and the valve and for resiliently supporting the Valve and piston as a unit.

9. A suction intensifier for a suction line extending between a source of suction and a. suction operated accessory, comprising a body having a Venturi passage therethrough and a chamber communicating with the delivery side thereeof, a fluid pressure responsive unit including a valve for controlling the passage of atmospheric air through the injector portion of the Venturi passage, said unit being movable as a unit, and resilient means urging the valve to its inoperative position.

HENRYl HUEBER. ERWIN C. HORTON. 

